What you need to do to turn off TIFF support in XPaint is:

        1) Edit Local.config and change the #define HaveTIFF
           to #undef HaveTIFF
        2) make Makefile
        3) make Makefiles
        4) make install

The other alternative is to pick up a copy of the TIFF
distribution, which is available for ftp from sgi.com as
        graphics/tiff/v3.0.tar.Z

Hope this helps,
David Koblas